Concentrator-belt-feed mechanism.



K. SENN.

OONGENTRATOR BELT FEED MECHANISM.

APPLICATION FILED OCT. 28, 1911. v 1,059,494, Patented Apr. 22, 1913.

fl ze ea I @Zfimz.

K. SENN.

GONGENTRATOR BELT FEED MECHANISM.

APPLICATION FILED OUT. 28, 1911. 1,059,494, Patented Apr. 22, 1913.

3 SHEETS-SHEET 2.

NOCIIIAPH K. SEN N.

GONOENTRATOR BELT FEED MECHANISM.

APPLIGATION FILED 00:1. 28, 1911. 1 ,059,494.

Patented Apr.22, 1913.

3 SHEETS-SHEET 3.

COLUMBIA PLANOGHAP CO. WASHINGTON. I). c.

30 of any sudden :jolts or shocksin the mecha- UNITED I STATESPATENT OFFICE;

KABIJI .SENN, OFNALA MEIDA, CALIFORNIA.

CONCENTRATOR-IBELT-sIFEED; MECHANISM.1

Specification of: Letters Patent.

Applicationfiled 0ctober 28, 1911. Serial:No.:657 ,306.

To all whomit mag concern:

Be it known that I, KARI. SENN, a cit zen of the United States,residing at Alameda, in the county of :Alameda and State of Cali fornia, have invented new. and useful Im- Concentrator Belt Feed Mechanism, of which: the :following is a p impart a: gradual and regular advance :or.

provements in specification.

This invention relates: to belt: concentra- 3 tors, and particularly to mechanism :for

imparting to the. travelin belt of the concentrator a peculiar and e ective motion :for I the concentration: ofvalues carried by the pulp fed to the belts The object of the present pan; to provide in combination witha belt concentrator a peculiar mechanism capable of reciprocating the table laterally, andat the :same timegivingthe belt :on the table a number :of :motions, 1 which combined result: for one cycle of the mechanism gives: to

esired motion can beimparted to a travel-1 ing concentrator belt without .the creation nism on belt, the resulth of which .wouldbe the reduction of the efiiciency of the concentrator; and which mechanism .is deslgned and adjustable to produce a gradual and regular feed :of the belt in one direction at each cycle of operation of the mechanism.

The inventionconsists of the parts and the 1 construction and combination: of parts I as hereinafter:; more fully described and claimed, havingreferenceto the accompanying drawings, lmwhich fi I Figure 1 lsa side elevation: of the proved mechanlslm: Fig. :2 1s1a planvlew of :the same. Fig.; 3lis an endwiew of the eccentrics. Fig.4 is a section online X-r-X Fig. 1.1 I

Various attemptsohave been made to impart to a concentrator belt 2, of a well :jknown type of concentrating mechanism, :a motlon closely simulating :that of a miners pan when manipulated for the: concentration; of values; In many oftheseattempts of which 'Ihave knowledge, radical deficiencies have been :observed which are due largely to the incapacity: of the apparatus to :operate inventionis to 1 provide a mechanism capable oi imparting: to a traveling :concentrator:belt a motion well known as the :motion: 10ft a :miners;

Patented A ea-1913.1

without the violent shocks or. jerky and ir:

regular movements. It is with the object in imparting to the concentratorbelti2 a motion WhlCll will be as free friomlshock and jerks and: as nearly; spiral or :cycloidal as it: 1s posslble to obtain, and at. the same time feed of the belt.

In the present instance I have shown only and being: supported upon. a head cylinder a portion: of the belt 2 as traveling around i 3,:mounted upon and driven by a transverse 1 1 shaft4 journaled inappropriate bearings 5 upon a table 6 which is mounted for lateral I reciprocationa Mounted to one side of and i parallel with the :tablelfiis a driven shaft 7 upon which is secured apulley 8 whereby power may be imparted to drive :the shaft. Upon the shaft ma be secured one. or more eccentrics 9, to: w ich are connected: connecting rods 19 which: are secured appropriately tolthe table 6.1 Thus :as the shaiti 7 is revolved, the eccentric: 9 will reciprocate the entire table structure laterally, andthis 1 lateral reciprocation of the table 6 will give to the belt 21a precisely similar lateral side shake; In producing the desired motion; of the belt, I employ another'eccentric, as: 11,

whichis secured upon the shaft? and upon which is mounted an:eccentric strap 12, one end ':of:whichl isformedwith a ball and socket joint 13, inwhichjointis connected the: outer or swinging! endof an: arm or. lever 14 which is loosely fulcrumed at its other end: upon the cylinder shaft 4. Intermediate its endthere is formedfinthe: lever 14 a pocket .or chamber 15 havingn:

rear inclined wall 16.1 In the pocket :15 there is mounted a clutch device, as :tlvbflll or roller 117,; which isadapted to rise into: frictional and binding engagement withithe flange 18 of a clutch Wheel 19 which? is keyed or otherwise secured on: the head: shaft 1.1:

. It is wellltostate herethat thecenjter. of: the eccentric 11: ;is in the same radialline with the center of the eccentric 9 which imparts to the table 6 and belt2 aside shake. In: the present instance Iihaveshown the eccentrics i9 and :11 as being piece,thc1outer end of WhlOl'l ishdiametrically slot-ted, as: at 20, :to receive an adformed in one:

justable crank 21 which maybe secured juxtaposition :by suitable locking devices, as a set screw. 22 and aloe]: screw23. The:

crank .21 is adjustable'in the same radialline in whichanepositioned the'centers of;

the eccentrics 9and 11. The particular arrangement of the centers of the eccentrics and the crank isanimportant and essential feature in the production of the desired motion in. the cencentrator belt 2."

Thecrank 21 is provided with a; anal,

upon which may swing one end of link 25, the lower end of which is provided with a'sock'et to receiveaball 26 formed'on' the outer end of Ianarm orlever 27 "which. also is looselyjmounted upon the head-shaft4.

The l ever27'is recessed at 28 and has an in- ,clined wall 29.. In'the recess 28 of the arm 27 is mounted a clutch device, as a roller or cylinder 30, adapted to engage the inner surface of the drum flange 18.

when the1r'respect1vearms are operatlve, 1n

. The clutch devices 17 and 30' are designed to engage the drumflange 18 in one instance thecase of thejpinf 17 in-arm 14 during the'downwardmovement of thelatten'and in the casefof'the. pin or roller 30in the upward 'movementof its arm 27. In other words,during the rotation of the shaft 7 withits-eccentrics andthe crank when the arm 14 is moving upward, its respective clutch roller 17j'drops'inits recess 15 and is thereforeinoperative and free of the drum flange 18; whereas during the upward movement of the arm 27, which occurs at the same ti' a the upward movement of the arm 14', the clutch roller 30 rolls downward .in-its binds upon the inner surface of the flange respective recess until it' contacts with and 18, thus causing the clutch wheel as it is rotatedto turn the shaft 4 and the head .cyl

'inder 8 and thus move the belt 2-upwardly and forwardly a determined amount. This forward movement of the belt 2 will occur durin'g'lfa (complete one-half cycle 1 or: oneh'alf revolution of the shaft 7 and the crank 21 which operatesthe arm 27 and through gitsrespective clutch 30 turnsthe belt-feedin'g'jdrumi3 Obviously as the remaining one-half revolution of the shaft begins, the

' levers "14 and 27 will start downward, at

which instant the clutch 30' will become in- :operative and the clutch. 17 will become oper'ativeand thus engage and-turn the drum whee119.

"If the proportions of the parts and the Y relativethrows of the eccentric 11 and the crank-21 were so. designed, the. annular movementof the drum'19'could bemade of equal, successive lengths. In .other' words,

" "the arc of movement given to the drum 19 v in one direction might be made, for instance, twenty degrees and the "opposite movement of the'drum made an equal number of de 'grees, in which case the belt 2 would simply moveiforwa'rd and backward equal length steps and there would be no advance in one dlrection whatever.

t aami -To-insure a eg'ular and uniform feed. of

the belt'2 I-have madeone of the actuating 1 would move could be increased or decreased relative the" shaft :7 'as it is only necessary 2 to make-one of the .lever actuating devicesj.

adjustable in order to result.

produce the desired' Thefo perat-ion of themechanism will be as l follows: Having adjusted the centers of the eccentric 9, eccentric 11 and crank 2l-ina common radius from the center of the shaft and then moving the shafti'to. a position shown in Fig; 1, at which place the arms 14 and 27 will be in theirlowermost positions and the table 6 will be in a position approxi- 1 mately the center of itscomplelte lateral re- 'ciprocatiom-if now the shaft 7be given a one-half revolution in the direction of arrow a, the arms 14 and 27- will start to swing upward and the clutchYZSO will becomeeffec tive to turn the clutch wheel-l9 in an are equal to the movement of thelever 27 which movement of the clutch wheel 19 will turn the head cylinder 3 and advance the belt from, a point 79,13 ig. 2, to the point 0. During this as forward movement of the belt 2 fromthe point I) to the point c-about the cylinder 3, 7

there will simultaneously occur a movement of thet-able 6 fromits central'position d to the extreme oppositeposition on one side, as j at e, and the resultingcomposite movement of the belt 2 aroundthe'cylinder and the side shake Eof 'the table from its center position to the extreme on one side will give to the belt I 2 a nearly semicircular -movement I through its entire area, which movementis indicated by the curved line f, Fig. 2. Having turned the shaft acne-half revolution so that the centers of the eccentrics 9'and'1'1 and the crank 21 are swungfrom lowermost T position to the uppermost position relative to the shaft,,the'continuation of theicycle of movement for the remaining one-half revolution, of the shaft" imparts to the arms 14 j d and 27 a downward movement, at the beg-in: 351.

ning of which the clutch 30 in arm 27 becomes inoperative and the clutchroller 17k in arm 14 becomes operative and thus en-i' gages and turns the clutch wheel 19: Due to the differenceof their, respective lengths I and due to the difference-of the eccentricity oft-he centers of the eccentric 11 andthe crank,21,the arms 14 an'd 27 move in arcs of different lengths. v

In the present instance inga one-half throw of theshaft'7 thanwill the eecentricities and proportions of the'parts are such that 12 5. h

the lever 14 will move in a smaller arc du'r:

the arm27, and thereforethe clutch-roller 17 will be able to turnthe clutch wheelll9 to a less extentor in. a shorter arc thaniis,

forward by the arm 27 In practice I find that inorder to produce the closest approximation to a motion of a miners served that as the arm a 14: is1makin sufficiently to givethe belt 2 a motion equal to thefull side shake of the table, which anthat the rearward motion of the belt 2 might be equal to the total side shake 1 of the table 6, and, therefore it? iWlll be obits 1 downward stroke litvwillturn the cylin er ;3

latter is simultaneouslybeing :moved from its center position :01 toward its extreme 0pposite throw, indicated at g, and by the time i the complete half turn of the shaft7 is made the table will ihave been moved from the center line or ipositiontd to'the limits: of its: motion 9 and back to d, simultaneously with which side shake the belt 2 has been moved from the point 0 rearward to the point It;

the resultant effect of the side shake and;

backfeed being; as indicated a true semicircular motion shownby the line c in the diagram on Fig. 2. t

From the foregoing descriptionait will be manifest that, with the table at the center of its lateral side shake, and at which time a point on the belt 2 will beat the place 1indicated at b, Fig; 2,vduringa one-half revo lution of theshaft7, the table will be shifted from its center position to the limit of its side shake in one direction atye. simulta neously therewith the belt 2 will be ad-1 27 and: its clutch 30 are vmolving upward? By the time the table dis returned from its 1 witnesses. 1

limit of movement at eback to its central position d, the whole advance of the belt 2 will have; been made 1 and every point ;of which would have been carried in anorbit or \path represented ;by \the curved line f. i As the :table 6 is carried from the center position d for the remaining; portion; of its side shake to the line 9, the arm le will become efiective to reverse the direction of motion;of the belt 2 and carry it back tothe: point it; theidistance between the point 0: and the point It representing the direct backs feed lof the belt, and the distance between the pointh and the point 5 representing the exact amount which every pointv in the belt has actually advanced ifromthe beginning of operatiomof a single cycle of the mechanism\ when the belt was started from the point indicated at b. I-Iavingthus described my invention, what I claim and desire to secure by Letters Patentis- The combination witha table and lsupports upon which it is capable of movement in a isingle direction, of an eccentric :upon

a horizontally revoluble: shaft,1 connections table having a 1 pulley secured thereon,

clutches engaging the ulley rim alternately in 1 opposite dlIGCtlOIlS, a crank upon 1 the icecentric shaft having its throw in alinement with that of the eccentric, arms by which the clutches areactuated, and links connecting said arms withithe crank and the eccentric respectively.

lnltestimony whereof I have hereuntoiset my hand in the presenceiof two subscribing:

SENN;

Witnesses: a G: STRONG,

CHARLEsEDELMAm copies of this: patent may be obtained tort flve cents each, by addressing the a Commissioner of Patent:

1 Washington, 13.10.? I i 

